package cn.sky.demo.utils;

import java.security.MessageDigest;

public class MD5Util {
private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));
return resultSb.toString();
    }
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
            n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
    }
public static String encode(String origin) {
return encode(origin, "UTF-8");
    }
public static String encode(String origin, String charsetname) {
        String resultString = null;
try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
return resultString;
    }
}
